summaryrefslogtreecommitdiff
path: root/usr/src/lib/libsecdb/common/i.rbac
blob: 6c2b9bf4e519b758ca3b5b0f99ecd19e1bcd8d5d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
#!/bin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
# i.rbac
#
# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# class action script for "rbac" class files
# installed by pkgadd
#
# Files in "rbac" class:
#
# /etc/security/{prof_attr,exec_attr,auth_attr}
# /etc/user_attr
#
#  Allowable exit codes
#
# 0 - success
# 2 - warning or possible error condition. Installation continues. A warning
#     message is displayed at the time of completion.
#

umask 022

tmp_dir=${TMPDIR:-/tmp}

PATH="/usr/bin:/usr/sbin:${PATH}"
export PATH

basename_cmd=basename
cp_cmd=cp
egrep_cmd=egrep
mv_cmd=mv
nawk_cmd=nawk
rm_cmd=rm
sed_cmd=sed
sort_cmd=sort

# $1 is the type
# $2 is the "old/existing file"
# $3 is the "new (to be merged)" file
# $4 is the output file
# returns 0 on success
# returns 2 on failure if nawk fails with non-zero exit status
#
dbmerge() {
#
# Remove the ident lines.
#
	${egrep_cmd} -v '^#[pragma 	]*ident' $2 > $4.old 2>/dev/null
#
# If the new file has a Sun copyright, remove the Sun copyright from the old
# file.
#
	newcr=`${egrep_cmd} '^# Copyright.*Sun Microsystems, Inc.' $3 \
	    2>/dev/null`
	if [ -n "${newcr}" ]; then
		$sed_cmd -e '/^# Copyright.*Sun Microsystems, Inc./d' \
		    -e '/^# All rights reserved./d' \
		    -e '/^# Use is subject to license terms./d' \
		    $4.old > $4.$$ 2>/dev/null
		$mv_cmd $4.$$ $4.old
	fi
#
# If the new file has the CDDL, remove it from the old file.
#
	newcr=`${egrep_cmd} '^# CDDL HEADER START' $3 2>/dev/null`
	if [ -n "${newcr}" ]; then
		$sed_cmd -e '/^# CDDL HEADER START/,/^# CDDL HEADER END/d' \
		    $4.old > $4.$$ 2>/dev/null
		$mv_cmd $4.$$ $4.old
	fi
#
# Remove empty lines and multiple instances of these comments:
#
	$sed_cmd -e '/^# \/etc\/security\/exec_attr/d' -e '/^#$/d' \
		-e '/^# execution attributes for profiles./d' \
		-e '/^# See exec_attr(4)/d' \
		-e '/^# \/etc\/user_attr/d' \
		-e '/^# user attributes. see user_attr(4)/d' \
		-e '/^# \/etc\/security\/prof_attr/d' \
		-e '/^# profiles attributes. see prof_attr(4)/d' \
		-e '/^# See prof_attr(4)/d' \
		-e '/^# \/etc\/security\/auth_attr/d' \
		-e '/^# authorizations. see auth_attr(4)/d' \
		-e '/^# authorization attributes. see auth_attr(4)/d' \
		    $4.old > $4.$$
	$mv_cmd $4.$$ $4.old
#
# Retain old and new header comments.
#
	$sed_cmd -n -e '/^[^#]/,$d' -e '/^##/,$d' -e p $4.old > $4
	$rm_cmd $4.old
	$sed_cmd -n -e '/^[^#]/,$d' -e '/^##/,$d' -e p $3 >> $4
#
# Handle line continuations (trailing \)
#
 	$sed_cmd \
 	    -e '/\\$/{N;s/\\\n//;}'  -e '/\\$/{N;s/\\\n//;}' \
 	    -e '/\\$/{N;s/\\\n//;}'  -e '/\\$/{N;s/\\\n//;}' \
 	    -e '/\\$/{N;s/\\\n//;}'  -e '/\\$/{N;s/\\\n//;}' \
 	    $2 > $4.old
 	$sed_cmd \
 	    -e '/\\$/{N;s/\\\n//;}'  -e '/\\$/{N;s/\\\n//;}' \
 	    -e '/\\$/{N;s/\\\n//;}'  -e '/\\$/{N;s/\\\n//;}' \
 	    -e '/\\$/{N;s/\\\n//;}'  -e '/\\$/{N;s/\\\n//;}' \
 	    $3 > $4.new
#
#!/usr/bin/nawk -f
#
#       dbmerge type=[auth|prof|user|exec] old-file new-file
#
#       Merge two versions of an RBAC database file. The output
#       consists of the lines from the new-file, while preserving
#       user customizations in the old-file. Specifically, the
#       keyword/value section of each record contains the union
#       of the entries found in both files. The value for each
#       keyword is the value from the new-file, except for three
#       keywords ("auths", "profiles", "roles") where the values
#       from the old and new files are merged.
#
#	The output is run through sort except for the comments
#	which will appear first in the output.
#
#
	$nawk_cmd  '

BEGIN {
	FS=":"
}

/^#/ || /^$/ {
	continue;
}

type == "auth" {
	key = $1 ":" $2 ":" $3 ;
	if (NR == FNR) {
		short_comment[key] = $4 ;
		long_comment[key] = $5;
		record[key] = $6;
	}
	else {
		if ( $4 != "" ) {
			short_comment[key] = $4 ;
		}
		if ( $5 != "" ) {
			long_comment[key] =  $5 ;
		}
		print key ":" short_comment[key] ":" long_comment[key] ":" \
		    merge_attrs(record[key], $6);
		delete record[key];
	}
}

type == "prof" {
	key = $1 ":" $2 ":" $3 ;
	if (NR == FNR) {
		comment[key] = $4;
		record[key] = $5;
	}
	else {
		if ( $4 != "" ) {
			comment[key] = $4 ;
		}
		if (key != "::") {
			print key ":" comment[key] ":" \
			    merge_attrs(record[key], $5);
		}
		delete record[key];
	}
}

type == "exec" {
	key = $1 ":" $2 ":" $3 ":" $4 ":" $5 ":" $6 ;
	# Substitute new entries, do not merge.
	record[key] = $7;
}

type == "user" {
	key = $1 ":" $2 ":" $3 ":" $4 ;
	if (NR == FNR)
		record[key] = $5;
	else {
		print key ":" merge_attrs(record[key], $5);
		delete record[key];
	}
}

END {
	for (key in record) {
		if (type == "prof") {
			if (key != "::") {
				print key ":" comment[key] ":" record[key];
			}
		} else
			if (type == "auth") {
				print key ":" short_comment[key] ":"  \
				    long_comment[key] ":" record[key];
			} else
				print key ":" record[key];
		}
}

function merge_attrs(old, new, cnt, new_cnt, i, j, list, new_list, keyword)
{
	cnt = split(old, list, ";");
	new_cnt = split(new, new_list, ";");
	for (i = 1; i <= new_cnt; i++) {
		keyword = substr(new_list[i], 1, index(new_list[i], "=")-1);
		for (j = 1; j <= cnt; j++) {
			if (match(list[j], "^" keyword "=")) {
				list[j] = merge_values(keyword, list[j],
				    new_list[i]);
				break;
			}
		}
		if (j > cnt)
			list[++cnt] = new_list[i];
	}

	return unsplit(list, cnt, ";"); \
}

function merge_values(keyword, old, new, cnt, new_cnt, i, j, list, new_list, d)
{
	if (keyword != "auths" && keyword != "profiles")
		return new;

	cnt = split(substr(old, length(keyword)+2), list, ",");
	new_cnt = split(substr(new, length(keyword)+2), new_list, ",");

	# If the existing list contains "All", remove it and add it
	# to the new list; that way "All" will appear at the only valid
	# location, the end of the list.
	if (keyword == "profiles") {
		d = 0;
		for (i = 1; i <= cnt; i++) {
			if (list[i] != "All")
				list[++d] = list[i];
		}
		if (cnt != d) {
			new_list[++new_cnt] = "All";
			cnt = d;
		}
	}
	for (i = 1; i <= new_cnt; i++) {
		for (j = 1; j <= cnt; j++) {
			if (list[j] == new_list[i])
				break;
		}
		if (j > cnt)
			list[++cnt] = new_list[i];
	}

	return keyword "=" unsplit(list, cnt, ",");
}

function unsplit(list, cnt, delim, str)
{
	str = list[1];
	for (i = 2; i <= cnt; i++)
		str = str delim list[i];
	return str;
}' \
	type=$1 $4.old $4.new > $4.unsorted
	rc=$?
	$sort_cmd < $4.unsorted >> $4
	return $rc
}

# $1 is the merged file
# $2 is the target file
#
commit() {
	# Make sure that the last mv uses rename(2) by first moving to
	# the same filesystem.
	$mv_cmd $1 $2.$$
	$mv_cmd $2.$$ $2
	return $?
}

outfile=""
type=""
set_type_and_outfile() {
	#
	# Assumes basename $1 returns one of
	# prof_attr, exec_attr, auth_attr, or user_attr
	#
	fname=`$basename_cmd $1`
	type=`echo $fname | $sed_cmd -e s'/^\([a-z][a-z]*\)_attr$/\1/' `
	case "$type" in
		"prof"|"exec"|"user"|"auth") ;;
		*) return 2 ;;
	esac

	outfile=$tmp_dir/rbac_${PKGINST}_${fname}_merge.$$

	return 0
}

cleanup() {
	$rm_cmd -f $outfile $outfile.old $outfile.new $outfile.unsorted

	return 0
}

exit_status=0

# main

while read newfile oldfile ; do
	if [ -n "$PKGINST" ]
	then
		# Install the file in the "fragment" directory.
		mkdir -m 755 -p ${oldfile}.d
		rm -f ${oldfile}.d/"$PKGINST"
		cp $newfile ${oldfile}.d/"$PKGINST"

		# Make sure that it is marked read-only.
		chmod a-w,a+r ${oldfile}.d/"$PKGINST"

		# We also execute the rest of the i.rbac script.
	fi

	if [ ! -f $oldfile ]; then
		cp $newfile $oldfile
	else
		set_type_and_outfile $newfile ||
			set_type_and_outfile $oldfile
		if [ $? -ne 0 ]; then
			echo "$0 : $newfile not one of" \
			    " prof_attr, exec_attr, auth_attr, user_attr"
			exit_status=2
			continue
		fi

		dbmerge $type $oldfile $newfile $outfile
		if [ $? -ne 0 ]; then
			echo "$0 : failed to merge $newfile with $oldfile"
			cleanup
			exit_status=2
			continue
		fi

		commit $outfile $oldfile
		if [ $? -ne 0 ]; then
			echo "$0 : failed to mv $outfile to $2"
			cleanup
			exit_status=2
			continue
		fi

		cleanup
	fi
done

if [ "$1" = "ENDOFCLASS" ]; then
	exit 0
fi

exit $exit_status